Hydraulic nozzle.



W. A. DOBLE.

HYDRAULIC NOZZLE.

APPucATloN FILED APR. 10. 1913.

Patented Oct. 26, -1915.

2 SHEETS-SHEET l.

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/NvE/vrof? BY v; Ammvfy COLUMBIA PLANMRAPH C0..W^SHINGTON. u. c.

HYDRAULIC Noz-ZLE.

APPLICATION FILED APR|10|1913 Patented Oct. 26, 1915.

2 SHEETS-SHEET 2.

L Wa.

CULUMBIA PLANOGRAPH co., WASHINGTON. D. c.

For the purpose of the present application, the said valve 9 is illustrated as what is commonly known as a needle valve, although the shape and form of the said valve is not to be understood as being limited in any manner whatever, inasmuch as any suitably constructed valve capable of clos? -ing and opening the `outlet orifice of the vmovement by means of the lock pin 12,

which pin extends through a slot a in the guide block 11, straddling the nut 10 and fitting within the grooved portion 13 thereof. vWhile the nut 10 is thus held locked tothe guide block or bearing against longitudinal movement, it is nevertheless free rto rotate relative thereto and with the rotary movement thereof serves to feed the stem 6`outwardly and inwardly,-depending lon the di 'rection of its rotation.y The lock pin '12 is only employed when it is desired to secure a hand adjustment of the valve 9 relative tothe outlet orifice 3 of the nozzle, at all other times the said pin is removed and the stem 6 with the adjusting nut 10 thereon left free for longitudinal reciprocating movement.

lThe body portion 5 of the nozzle 1 is formed'with a fluid chamber 14, and within said chamber works a piston 15 to which is secured in any suitable manner the valve stem 6. With the chamber 14 communicates the separated ports 16 and 416 for the admission of a fluid supply under pressure into and out of the said chamber. From the nozzles body 5 .upwardly pojects an extension 17, which is provi-ded or formed with vertical passageways 18 and 18 which register respectively with the ports 16 and 16. Within the extension 17 of thevnozzle is located and works a slide cut-off sleeve or cylinder 19, which is closed at its upper end, and Within said cut-off sleeve is situated a vertically movable pilot valve 19, a pressure chamber 20 existing between the interior wall of the said cut-off sleeve and the pilot valve 19. The cut-off sleeve 19 is provided with a series of open ports a, b, b, c, which register respectively with the annular chambers d, CZ', e, e, within the extension 17, the ports a and b of the slide cutthe lower off' sleeve being controlled respectively by and upper heads of the pilot valve 19" Water or suitable fluid under pressure is admitted into the annular chamber al from a valve controlled pressure supply pipe 20, the wateror fluid under pressure entering the chamber al flowing into the pressure chamber 20 through the port of the slide sleeve 19. The waste fluid, as hereinafter explained, flows through the port into the sleeve 19 above the pilot valve 19, passing therefrom through the port c into the chamber e, from which it escapes through the outlet pipe 21. Through the pilot valve 19 is extended a rod 22, the collar 22 thereof resting on the upper end of the said valve. The said rod is held to the pilot valve by means of a securing nut 23 secured to the lower end thereof, so that the pilot valve is raised and lowered through the medium of the rod 22.

` The rod 22 is suitably connected at its upper end to a governor head 24. which in turn is connected to the rotatably mounted block 24 by means of the spring arms 25 which carry fly-balls 26 of a governor. Rotation is imparted to the said fly-balls from a shaft 27, driven by a belt, not shown, working over the belt pulley 2S secured to the driven shaft 27. At its inner end the shaft 27 carries a pinion 28, which is in mesh with a pinion 29 secured to the hub 29 of the block 24. It will be understood that the head 24 and the block 24 are loosely mounted on the rod 22 for free rotation. The rod 22 works through a support 80 secured to the upper end of the extension 17, which support carries the bracket extension 30 for the driven shaft 27 Within the support 30 is located a spring 31, which surrounds the rod 22 and acts against the sleeve 19 for holding vthe same in proper position relative to the extension 17. To the support 30 is pivoted a short depending link 32, the free end of which is pivoted to a lever 32. This lever is extended through a slot in the upper end of the cut-oft1 sleeve 19 and fulcrumed thereto, and to the free end thereof is pivoted a downwardly extended link 38, connected at its lower end to an arm 33 secured to and upwardly projected from the valve stem 6. The connection thus ma de between the said parts serves to actuate the same relative to the movement of the valve 9 controlling the outlet orifice 3 of the nozzle, as hereinafter explained.

The connecting stud. bolt or pin 34 bctween the upper end of the link 33 and the outer end of the lever 32 works within a slotted extension 34 extended from the lever 32', so as to properly guide the parts as swung inwardly and outwardly with the movement of the shiftable parts of the apparatus. The bolt 34 is adapted to loosely engage inthe slotted way 34. and these parts coperate to insure free vertical movetastiere ment .of the Icut oli' sleeve and prevent ,any binding tendency or -canting faction of )the sleeve in the (housing provided by 4the eX- tension 17, in the Vmovement of the out off sleeve under the action of :the levers 33, 32', and link 32.

It will beunderstood that the shaft 27 Ais driven from the motor or water Wheel actuated by the jet .stream issuing `from the outlet oriiice of the nozzle, which is directed against the vanes or buckets thereof. i

The operation of the improved nozzle is as follows: rlhe valve 9 having first been set or adjusted to regulate the outlet orifice 3 for the stream to issue therefrom, and the lock pin 12 removedV to allow for free slide movement of the stem. rPhe water or issuing stream discharging from the nozzle places into action the motor or wheel against which it is directed, which in turn actuates the shaft 27 for driving the fly-balls 24 of the governing means. On opening the valve 35 of the pressure supply pipe 20, which` preferably extends from the pressure water line pipe, fluid under pressure is admitted into the pressure chamber 20 of the cut-one sleeve 19. In case the working load on the driven motor should for any reason decrease, calling for a reduction as tothe water quantity of the issuing impact stream, the fly-ball 26 will at once over-race, that is, be driven at a higher rate of speed than under normal working conditions. As the flyballs 26 are thrown outwardly by centrifugal `force due `to the high rotative speed thereof, the spring arms 26 moving therewith expand laterally andare drawn together vertically, drawing downwardly the head 24 and the rod 22. This movement of the rod 22 forces downwardly the pilot valve 19 to gradually uncover the porta of the slide cut-olf sleeve 19, causing the water `or pressure fluid to iiow from within pressure chamber 20 into the chamber 14C of the nozzle through the communicating passageway 18 and the port 16. vThe fluid under pressure thus admitted into the chamber 14 back of the piston 15 therein, forces outwardly the said piston and the valve stem 6 to which it is attached and gradually moves the valve 9 into the outlet orifice 3 of the fnozzle, gradually reducingthe area of the outlet orifice until the stream issuing therefrom has been properly adjusted as to water quantity to the working requirements of the motor driven thereby. The moment this shifting movement of the valve 9com` mences, the arm 33 carried bythe stem 6 .throws the link 33 and the lever 32 so as to permit the spring 31 *to-gradually force downwardly the cut-oiflsleeve 19 until the port a. is closed to cut off the fluid supply pressure into Vthe chamber 14 and bringing the valve 9 to astate of rest and restoring the iiyballs to normal yposition. The lactonof the cut-0H sleeve 1.9.is ialmostinunison with the .movement 1.of the pilot `valve 19, excepting for the slight `initial movement permitted .thesaid valve toadmit fluid pressure back oft-he ,piston 15. On a `'call for a greater water quantity .of the` impact stream onto the driven motor, due to an increase load placed .thereon, the speed of the fly-balls 26 lowers below normal speed,-which .causes an upward expansion or straightening out of ,the Aspring arms 25. This movement of the arms raises or lifts the rod 22, carrying 'therewith the pilot valve 19 to uncover `the port b ofthe sleeve 1,9. rIhe fluid Vpressure thenflows from the chamber 20 into the passage-way 18 through the openport b, and into-the chamber 1411in advance of the piston 151through theport 16. VThe pressure thus applied in advance of the piston 15 gradual-lyforces the same inwardly, carrying therewith the stem 6 and withdrawing the valve V9 from within the outlet orifice 3 so yas to allow for a stream of increased area to issue from `the nozzle to proportion the sameto the working requirements of the motor driven thereby. As the piston commences its inward movement, the arm 33 moving with the stem 6 operates the link 33 and lever 32 to force upwardly the cutoff sleeve 19 to gradually close the port b and cutting off the Huid supply pressure in advance of the piston` 15, thus bringing the said piston and the valve 9 to a state of rest with the outlet area of the orifice 3 properly proportioned for the required impact-stream to issue therefrom for the working loadv of the driven motor. The fluid back of the piston 15 on the inward movement thereof `is displaced into the chamber 17 of the extension 17 beneath the slide cutolf sleeve 19 and is gradually forced into the discharge outlet 21 through the passageway 17 2, with which the chamber c communicates. On the outward movement of the piston 15, the {iuid in advance thereof is admitted into the chamber c through the passage-way 18 of the extension 17 and the ports b and c of the slide cut-off sleeve 19. It will thus be noticed from the above that the cut-off sleeve 19 moves in unison with the vpilot valve 19 after its initial movement to admit pressure for actuating the valve 15 in either direction. andv the said sleeve serves to gradually cut-off the fluid pressure relative to the gisten 15 as the water quantity of the impact stream is proportioned to the. working requirement of the load placed` onto the motor driven thereby. The movement of the slide cutoff sleeve ineither direction is slightly increased over the movement of the pilot valve, in order to close the portcontrolling the iuid pressure to the piston 15,-this movement .being equal to the initial movementipermitted the pilot-valve.

an increase or a decrease in the water quantity thereof, together vwith inter-connected working instrumentalities for automatically shifting theposition of the means for varying the area of the outlet orice in accordance' with such calls Vfor an increase or decrease 1n the water quantity of the issuing impact stream and positively bringing said means to a state of rest on the proper vadjusting being made and holding the same against movement until a call is made requiring a change in such adjustment.

In case of a rupture inthe governing means for actuating the controlling means forthe outlet orifice of the nozzle, the said controlling means may be manually actuated through the medium of the hand wheel 10 on the lock pin 12 being inserted to lock the adjusting nut 10 against longitudinal moveqment, as heretfore described.

The part l which in the body of the specification has been designated as the nozzle, in reality constitutes the waterway element of the nozzle. However, by the term nozzle as herein employed is meant the assembled parts l, 5 and 17, whether the same be formed as a single casting or as separate parts suitably united. In thepresent case, said features are disclosed as separate elements united one to the other, but such is merely illustrative of the preferred structural arangement.

While I have shown and described one embodiment of inter-connected instrumentalities for successfully carrying out the invention, such is merelythe preferred form for accomplishing-the desired vends in view, but

I do not wish to `bve-understood as confining myself to such an embodiment of the invention, inasmuch as I am well aware that changes may be made inthe details of construction and arrangement of the described working parts without creating a departure `from the nature, scope andl spirit of the invention.

Having thus described the invention what is claimed as new and desired to be protected by Letters Patent. is

l. In a hydraulic nozzle, a body part having a connected nozzle `part and a piston chamber, a valve for the nozzle outlet, a piston on the valve rod for actuating the same, a pilot valve cylinder positioned onthe body part, having a fluid pressure inlet, and outlets communicating with the piston chamber at opposite sides of said piston, a pilot valve for .regulating said outlets, a governorV for actuating the pilot valve, a fluid pressure eut off positioned within the valve cylinder,

a spring for normally holding the cut off in one position, and means connected to the valve stem acting in opposition to the spring for actuating the cut ofi in one direction.

2. In a hydraulic nozzle, a' body part, a nozzle and a piston chamber, a valve for said nozzle, a piston on the valve rod for actuating the same, a pilot valve cylinder positioned on the body part of the nozzle, having a fluid pressure inlet, and outlets communicating with the piston chamber at opposite sides of said piston, a pilot valve for regulating said outlets, a governor for actuating the pilot valve, a fluid pressure cut off sleeve interposed betwen the pilot valve and its cylinder, a bracket on the piston rod, a link connected to said bracket, an auxiliary lever connected with the link and pivotally supported at its opposite end, said auxiliary lever having a movable connection with said sleeve, and a spring interposed between one end of the sleeve and a iXed part on the device.

3. In a device of the class described, the combination of a nozzle having a horizontal extension forming a piston chamber, a needle valve for regulating the orifice of the nozzle, a piston on the rod positioned within the piston chamber, an upright pilot valve casing positioned on said extension of the nozzle, said casing having in the wall thereofy channels communicating with the interior of the casing and with the interior of the piston chamber one at each side of the piston, a piston valve in the pilot valve chamber, having a valve rod projecting upwardly above the valve casing, a governor positioned on the valve casing and connected with said piston valve rod, a fluid pressure inlet port for the pilot valve cylinder, a sleeve cut olf interposed between the pilot valve and the pilot valve casing, a spring sleeved upon the pilot valve rod interposed between the end of said cut off sleeve and governor support, and a movable connection between said sleeve and the nozzle valve rod, substantially as and for the purpose described.

4. In a hydraulic nozzle construction, the combination of a horizontally disposed body part, a nozzle secured thereto, a needle valve for the outlet of the nozzle, said valve having a horizontally disposed stem projecting through the body part, and said body part having a fluid pressure chamber, and an upright extension having vertically disposed passageways registering with ports in the wall of said body part whereby to establish communication with opposite ends of the fluidl pressure chamber, a piston secured to said valve stem at a point within said fluid pressure chamber, a pilot valve in the upward extension of the body part, a cut olf sleeve interposed betwen the pilot valve and the inner annular wall of the upright extension, said cut o sleeve having openings, and

seid annular wail of the upward extension n testimony whereof I have signed my having openings, a governor, and seid sleeve name to this specification in the presence of having a part projecting above seid upright `two subscribing witnesses.

extension, and a lever connection between VILLAM A. DOBLE. said projecting part of the sleeve and the Witnesses:

needle valve stem, substantially es and for HARRY A. TOTTEN,

the purpose described. D. B. RICHARDS.

Uopies of this patent may be obtained for ve cents each, by addressing the Commissioner of Batents Washington, D. G. 

